<template>
  <div>
    <el-switch
      v-model="draggable"
      active-text="开启拖拽"
      inactive-text="关闭拖拽"
    ></el-switch>
    <el-button v-if="draggable" @click="batchSave">批量保存</el-button>
    <el-button type="danger" @click="batchDelete">批量删除</el-button>

    <el-tree
      :data="menus"
      :props="defaultProps"
      :expand-on-click-node="false"
      show-checkbox
      node-key="catId"
      :default-expanded-keys="expandedKey"
      :draggable="draggable"
      :allow-drop="allowDrop"
      @node-drop="handleDrop"
      ref="menuTree"
    >
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <span>
          <el-button
            v-if="node.level <= 2"
            type="text"
            size="mini"
            @click="() => append(data)"
            >Append
          </el-button>
          <el-button type="text" size="mini" @click="edit(data)"
            >edit
          </el-button>
          <el-button
            v-if="node.childNodes.length == 0"
            type="text"
            size="mini"
            @click="() => remove(node, data)"
          >
            Delete
          </el-button>
        </span>
      </span>
    </el-tree>

    <el-dialog :title="title" :visible.sync="dialogVisible">
      <el-form :model="category">
        <el-form-item label="分类名称">
          <el-input v-model="category.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标">
          <el-input v-model="category.icon" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="计量单位">
          <el-input
            v-model="category.productUnit"
            autocomplete="off"
          ></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="submitData">确 定</el-button>
      </span>
    </el-dialog>
  </div>

  <!-- <el-tree :data="data" :props="defaultProps" @node-click="handleNodeClick"></el-tree> -->
</template>

<script>
//这里可以导入其他文件(比如: 组件,工具js,第三方插件js, json 文件，图片文件等等)例如: import<<组件名称>> from '<<组件路径>>';

export default {
  components: {},
  props: {},
  data() {
    return {
      pCid: [],
      draggable: false,
      updateNodes: [],
      maxLevel: 0,
      title: "",
      dialogType: "", //edit,add  区分修改 和添加 弹出的框
      category: {
        name: "",
        parentCid: 0,
        catLevel: 0,
        showStatus: 1,
        sort: 0,
        prodcutUnit: "",
        icon: "",
        catId: null,
      },
      dialogVisible: false,
      menus: [],
      expandedKey: [],
      defaultProps: {
        children: "children",
        label: "name",
      },
    };
  },
  methods: {
    getMenus() {
      this.$http({
        url: this.$http.adornUrl("/product/category/list/tree"),
        method: "get",
      }).then(({ data }) => {
        console.log("成功獲菜单數據", data);
        this.menus = data.data;
      });
    },
    batchDelete(){
        let catIds = [];
        let checkedNodes = this.$refs.menuTree.getCheckedNodes();
        for (let i = 0; i < checkedNodes.length; i++) {
           catIds.push(checkedNodes[i].catId);
        }
        this.$confirm(`是否删除【${catIds}】菜单 , 是否继续?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      }).then(()=>{
       this.$http({
       url: this.$http.adornUrl('/product/category/delete'),
       method: 'post',
       data: this.$http.adornData(catIds, false)
       }).then(({ data }) => {
            this.$message({
          message: "菜单批量删除成功",
          type: "success",
        });
        this.getMenus();
        });
      }).catch(()=>{

      });
    },
    batchSave() {
      this.$http({
        url: this.$http.adornUrl("/product/category/update/sort"),
        method: "post",
        data: this.$http.adornData(this.updateNodes, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单顺序修改成功",
          type: "success",
        });
        //刷新出新的菜单
        this.getMenus();
        //设置需要默认展开的菜单
        this.expandedKey = this.pCid;
        this.updateNodes = [];
        this.maxLevel = 0;
        // this.pCid = 0;
      });
    },
    updateChildNodeLevel(node) {
      if (node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          var cNode = node.childNodes[i].data;
          this.updateNodes.push({
            catId: cNode.catId,
            catLevel: node.childNodes[i].level,
          });
          this.updateChildNodeLevel(node.childNodes[i]);
        }
      }
    },

    handleDrop(draggingNode, dropNode, dropType, ev) {
      //1当前节点最新父节点id
      let pCid = 0;
      let siblings = null;

      if (dropType == "before" || dropType == "after") {
        pCid =
          dropNode.parent.data.catId == undefined
            ? 0
            : dropNode.parent.data.catId;
        siblings = dropNode.parent.childNodes;
      } else {
        pCid = dropNode.data.catId;
        siblings = dropNode.childNodes;
      }
      this.pCid.push(pCid);
      //2当前拖拽节点的最新顺序
      for (let i = 0; i < siblings.length; i++) {
        if (siblings[i].data.catId == draggingNode.data.catId) {
          //如果遍历的是当前正在拖拽的节点
          let catLevel = draggingNode.level;
          if (siblings[i].level != draggingNode.level) {
            //当前节点的层级发生变化
            catLevel = siblings[i].level;
            //修改它子节点的层级
            this.updateChildNodeLevel(siblings[i]);
          }
          this.updateNodes.push({
            catId: siblings[i].data.catId,
            sort: i,
            parentCid: pCid,
            catLevel: catLevel,
          });
        } else {
          this.updateNodes.push({ catId: siblings[i].data.catId, sort: i });
        }
      }
      //当前拖拽节点的最新层级
    },
    allowDrop(draggingNode, dropNode, type) {
      //1 被拖动的当前节点以及锁在的父节点总层数不能大于1
      //1) 被拖动的当前节点总层数
      console.log("allowDrop: ", draggingNode, dropNode, type);
      this.countNodeLevel(draggingNode);
      //当前正在拖动的节点+父节点所在的书读不大于3即可
      console.log("深度: ", this.maxLevel);
      let deep = Math.abs(this.maxLevel - draggingNode.level) + 1;
      console.log("深度: ", deep);
      if (type == "inner") {
        return deep + dropNode <= 3;
      } else {
        return deep + dropNode.parent.level <= 3;
      }
    },
    countNodeLevel(node) {
      //找到所有子节点,求出最大深度
      if (node.childNodes != null && node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          if (node.childNodes[i].level > this.maxLevel) {
            this.maxLevel = node.childNodes[i].level;
          }
          this.countNodeLevel(node.childNodes[i]);
        }
      }
    },
    submitData() {
      if (this.dialogType == "add") {
        this.addCategory();
      }
      if (this.dialogType == "edit") {
        this.editCategory();
      }
    },
    append(data) {
      console.log("append", data);
      this.dialogType = "add";
      this.title = "添加分类";
      this.dialogVisible = true;
      this.category.parentCid = data.catId;
      this.category.catLevel = data.catLevel * 1 + 1;

      this.category.catId = null;
      this.category.name = "";
      this.category.icon = "";
      this.category.prodcutUnit = "";
      this.category.sort = 0;
      this.category.showStatus = 1;
    },
    edit(data) {
      this.dialogType = "edit";
      this.title = "修改分类";
      this.dialogVisible = true;
      //发送请求获取当前节点最新数据  c53 12:00
      this.$http({
        url: this.$http.adornUrl(`/product/category/info/${data.catId}`),
        method: "get",
      }).then(({ data }) => {
        //请求成功
        console.log("要回显的数据", data);
        this.category.name = data.data.name;
        this.category.catId = data.data.catId;
        this.category.icon = data.data.icon;
        this.category.prodcutUnit = data.data.productUnit;
        this.category.parentCid = data.data.productUnit;
        this.category.showStatus = data.data.showStatus;
      });
    },
    //添加三级分类  提交请求
    addCategory() {
      console.log("提交三级分类数据", this.category);
      this.$http({
        url: this.$http.adornUrl("/product/category/save"),
        method: "post",
        data: this.$http.adornData(this.category, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单保存成功",
          type: "success ",
        });
        //关闭对话框
        this.dialogVisible = false;
        //刷新出新的菜单
        this.getMenus();
        //设置需要默认展开的菜单
        this.expandedKey = [this.category.parentCid];
      });
    },
    //修改三级分类 提交请求
    editCategory() {
      var { catId, name, icon, productUnit } = this.category;
      this.$http({
        url: this.$http.adornUrl("/product/category/update"),
        method: "post",
        data: this.$http.adornData({ catId, name, icon, productUnit }, false),
      }).then(({ data }) => {
        this.$message({
          message: "菜单修改成功",
          type: "success",
        });
        //关闭对话框
        this.dialogVisible = false;
        //刷新出新的菜单
        this.getMenus();
        this.expandedKey = [this.category.parentCid];
      });
    },

    remove(node, data) {
      var ids = [data.catId];
      //删除前弹框提示
      this.$confirm(`是否删除【${data.name}】菜单 , 是否继续?`, "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      }).then(() => {
        this.$http({
          url: this.$http.adornUrl("/product/category/delete"),
          method: "post",
          data: this.$http.adornData(ids, false),
        })
          .then(({ data }) => {
            this.$message({
              message: "恭喜你菜单删除成功",
              type: "success",
            });
            //刷新出新的菜单
            this.getMenus();
            //设置需要默认开展的菜单
            this.expandedKey = [node.parent.data.catId];
          })
          .catch(() => {});
        console.log("remove", node, data);
      });
    },
  },
  created() {
    this.getMenus();
  },
  //生命周期 挂载完成(可以访问DOM元素)
  mounted() {},
  beforeCreate() {},
  beforeMount() {},
  beforeUpdate() {},
  updateded() {},
  beforeDestroy() {},
  destroyed() {},
  activated() {},
};
</script>
<style>
</style>
